/*
    Copyright 2009 Spencer B. Koehler, Ph.D.

    This file is part of the Brillig Toolkit.

    The Brillig Toolkit is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    The Brillig Toolkit is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with The Brillig Toolkit.  If not, see <http://www.gnu.org/licenses/>.
*/
package org.brillig.io;


/**
 * Simple implementation of the file path iterator.
 * <p>
 * @author Spence Koehler
 */
public class SimpleFilePathIterator implements FilePathIterator {

  private String[] filePaths;
  private int pathNum;

  public SimpleFilePathIterator(String[] filePaths) {
    this.filePaths = filePaths;
    this.pathNum = 0;
  }

  public SimpleFilePathIterator(String[] filePaths, int startIndex) {
    this.filePaths = filePaths;
    this.pathNum = startIndex;
  }

  /**
   * Get the next absolute path, or null if there are no more.
   */
  public String getNextFilePath() {
    String result = null;

    if (pathNum < filePaths.length) {
      result = filePaths[pathNum++];
    }

    return result;
  }
}
